Keiskea elsholtzioides f. purpurea X. H. Guo.

Herbs. Stems ca. 40 cm, purplish red, densely spreading ciliate villous, subglabrescent. Petiole 5.5-7 cm; leaf blade ovate to ovate-oblong, 1.5-15 × 1.2-8 cm, ± leathery or thick papery, adaxially dark green, sparsely minutely hispid, subscabrous, abaxially sparsely ciliolate and impressed glandular, base cuneate to shallow cordate, margin crenate-serrate to coarsely serrate, apex acuminate. Racemes terminal and axillary, to 18 cm after anthesis, ciliate villous; verticillasters ± widely spaced. Pedicel ca. 2.5 mm. Calyx ca. 3 mm, ciliate hirsute, throat tufted ciliate on each tooth sinus; teeth ca. 2 mm, lanceolate, oblong-lanceolate, or ovate-lanceolate, margin sparsely ciliate. Corolla white, tinged purple, or purple, ca. 8 mm, puberulent; tube funnelform, ca. 1.7 mm wide at base, ca. 4.7 mm wide at throat; limb 2-lipped, lips straight; lobes circular, upper lobe ca. 1.6 mm, lower lobe ca. 2 mm. Exserted filaments purple. Ovary glabrous. Fl. Jun-Oct, fr. Oct-Nov.

* Grassy areas, thickets, broad-leaved forests on hills; 200-500 m. Anhui, Guangdong, Hubei, Hunan, Jiangxi, Zhejiang.